[ruby-core:94003] [Ruby master Bug#15449] Range#=== is not using cover in Ruby 2.6

Issue #15449 has been updated by jeremyevans0 (Jeremy Evans).

Backport changed from 2.4: UNKNOWN, 2.5: UNKNOWN to 2.5: DONTNEED, 2.6: REQUIRED
File range-case-cover-string.patch added

I agree that this is a bug, and not the intended behavior now that `Range#===` calls `Range#cover?` in most cases.  Hopefully nobu can confirm.  Attached is a patch that fixes the behavior.

I think this should be backported to 2.6, assuming this behavior is not intentional.

----------------------------------------
Bug #15449: Range#=== is not using cover in Ruby 2.6
https://bugs.ruby-lang.org/issues/15449#change-80219

* Author: ana06 (Ana Maria Martinez Gomez)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 2.6.0dev (2018-12-20 trunk 66466)
* Backport: 2.5: DONTNEED, 2.6: REQUIRED
----------------------------------------
```
irb(main):105:0> ('A'..'Z').cover? 'ANA'
=> true
irb(main):106:0> ('A'..'Z') === 'ANA'
=> false

```

Is this expected? Should `===` use cover according to NEWS in Ruby 2.6?


```
> ruby -v
ruby 2.6.0dev (2018-12-20 trunk 66466) [x86_64-linux]
```


---Files--------------------------------
range-case-cover-string.patch (3.69 KB)


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